Furnace.



IIIIIIIIIIIII LE N 0 M 0 D E L.

PATENTED SEPT. 13, 1904.

D J U N E 8 1 9 0 3.

il/l'incssesx PATEN'TED SEPT. 13, 1904.

T. G. SBLLEGK.

FURNACE.

APPLICATION FILED JUNE 8. 1903.

3 SBEETS-SHEET 2.

N0 MODEL.

HHWIH NW W W W No. 770,025. PATENTED SEPT. 13, 1904.

T. G. SELLECK.

FURNACE.

APPLICATION FILED JUNE 8, 1903.

NO MODEL. 3 SHEETS-SHEET 3.

fi All] Patented September 13, 1904.

UNITED STATES PATENT EETcE.

THEODORE G. SELLECK, OF CHICAGO, ILLINOIS, ASSIGNOR TO ACME STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 770,025, dated September 13, 1904..

Application filed June 8, 1903. Serial No. 160,630, No model.)

To all whom it may concern.-

Be it known that LTHEODORE G. SELLnoK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illi-.

nois, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

My invention relates particularly to furnaces constructed to maintain a high and uniform heat within compartments or receptacles in the furnace to which the fire does not have access, and is especially adapted for use as a converting-furnace, case-hardening furnace, and the like.

My present invention is in the nature of an improvement upon the furnace shown in my copending allowed application, Serial N 0. 108,059, filed May 19, 1902. In that furnace I show a combustion-chamber arranged at the rear of the furnace and provided with a deflecting-wall arranged to deflect, break up, and spread a jet of flame projected into the combustion-chamber from an oil-burner and to direct the same over the top of the deflectingwall and into a transverse fine, from which longitudinal flues lead forwardly under the boxes or receptacles and into the interior of the furnace. With that construction there is a great loss of heat by reason of the free radiation from the crown of the combustionchamber.

The special object of my presentinvention is to so improve the construction of the furnace shown in said application as to avoid such excessive loss by radiation. These and such other objects as may hereinafter appear are attained by the apparatus shown in the accompanying drawings, in which- Figure l is a side elevation of my furnace, partly broken away. Fig. 2 is afront elevation thereof. Fig. 3 is a cross-sectional view on the line 3 3 of Figs. 1 and ilooking in the direction indicated by the arrows. Fig. 4 is a longitudinal section on the line i 4 of Figs. 2, 3, 5, and 6 looking in the direction indicated by the arrows. Fig. 5 is a horizontal sectional view on the line 5 5 of Figs. 3 and 4: looking in the direction indicated by the arrows, and Fig. 6 is a horizontal sectional view These boxes C are arranged so as to provide lateral passage-ways or flues between adjacent boxes and like fines or passage-ways D between the end boxes of the rows and the wall of the furnace. The entire space above the boxes is preferably left open and constitutes a horizontal chamber or flue E.'

The boxes C are supported upon arches F, which preferably form the bottoms of the boxes, said arches F springing from longitudinal piers G. By means of this arrangement I provide a series of longitudinal lines, one beneath each of the boxes, said longitudinal flues I-I extending from a transverse flue or combustion-chamber I at the rear of the furnace to a transverse flue J at the forward end of the furnace. The fine J communicates with the horizontal chamber or flue E by means of vertical flues K. Just back of the vertical flues K baflie-walls L are preferably arranged between the boxes, which baflie-walls may extend the entire height of the boxes or only part of the height of the boxes, the purpose of said walls being to secure a proper distribution of the flame as it rises through the vertical fines K to the horizontal flue or chamber E and into the longitudinal flues D.

I prefer constructing the transverse flue or combustion-chamber I in the manner shown in the drawings that is, with a perceptible depth and with an inclined deflecting-wall M leading from the bottom of the combustionchamber to the longitudinal flues leading forwardly therefrom.

The back wall of the furnace, constituting also the back wall of the combustion-chamber, is perforated at N for the reception or entrance of the fuel-burner and is also preferably provided with air-inlets O P. This perforation N is so arranged that the jet of flame projected into the combustion-chamber will strike a defleeting-wall M, and thus will be spread into a sheet of flame so as to fill the forwardly-extending flues with substantial uniformity, thus securing uniform heating of all of the boxes of the furnace. At the same time it may be readily seen that the combustion-chamber may be so constructed that the forwardly-extending flues and the combustion-chamber will constitute,in practical effect, but one compartment divided by the supporting-twyers, which need not necessarily be continuous, as the only especially desirable feature of this structure is that the parts be so arranged as to safely support the boxes G and at the same time provide means for filling the space beneath the boxes with a mass of live flame, which shall sweep forwardly under the boxes, upward in front thereof, and backwardly over the top and along the sides thereof, so that the boxes shall be, in effect, surrounded at all points with a mass of live flame, which shall raise the entire interior of the furnace to a white heat, which may be maintained with substantial uniformity for an indefinite time.

It will be seen that whether the furnace be constructed exactly as shown or in accordance with the modification suggested there will be no loss of heat by radiation of from the crown of the combustion-chamber, because all such heat will be radiated directly into the boxes, which project over the combustion-chamber, and thus such heat which would otherwise be wasted will be utilized to increase the efliciency of the furnace.

I claim 1. A furnace of the class described, provided with a treating-box opening through one wall of the furnace, a combustion chamber arranged directly under one end of the treating box and flues so arranged as to conduct the flames from the combustion chamber forwardly under the treatingbox, thence upwardly around the box adjacent to its forward end, and thence backwardly and across the top and along the sides of the box, substantially as described.

2. A furnace of the class described, comprising a plurality of treating-boxes, spaced apart and mounted within the furnace, each of said boxes being provided with a charging-opening extending through one wall of the furnace, a combustion-chamber extending under said boxes at one end thereof, and flues so arranged as to first convey flames from the combustionchamber forwardly under said boxes, thence upwardly adjacent to the forward ends of said boxes, and thence backwardlyover the top and along the sides of said boxes and thence dow'nwardly and across the rear ends of said box.

8. A furnace of the class described, comprising a treating-box provided with a chargingopening extending through one wall of the furnace, a combustion-chamber arranged directly under said box and adjacent to one end thereof, a flue extending forwardly from said combustion-chamber and directly beneath said box, vertical flues leading upwardly from the forward end of said first-named flue, and adjacent to the forward end of said box, flues extending longitudinally of said box and backwardly from said vertical flues, and a horizontal flue extending over said box and backwardly from said vertical flues, substantially as described.

4. A furnace of the class described, comprising a plurality of treating boxes arranged alongside of each other and spaced apart, a combustion-chamber arranged directly under said boxes and adjacent to one end thereof, an outer wall of said combustion-chamber being provided with a burner-opening or twyer, and the rear of said combustion-chamber being provided with a deflecting-wall extending upwardly and toward the front of said furnace, said wall being arranged opposite to said burner-opening, and flues extending forwardly from the upper end of said wall, and other flues all arranged so as to conduct a mass of flame first forwardly beneath said boxes, then upwardly adjacent to and around the forward ends of said boxes, and thence rearwardly over the tops of said boxes and between said boxes, substantially as described.

THEODORE G. SELLECK. 

